3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(); $b = array(1 => 0); $a[$b[0]] = array(); print_r($a);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/XWs91
function name:  (null)
number of ops:  9
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    3     1        ASSIGN                                                   !1, <array>
    4     2        FETCH_DIM_R                                      ~4      !1, 0
          3        ASSIGN_DIM                                               !0, ~4
          4        OP_DATA                                                  <array>
    5     5        INIT_FCALL                                               'print_r'
          6        SEND_VAR                                                 !0
          7        DO_ICALL                                                 
          8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
154.24 ms | 1393 KiB | 15 Q